﻿/*
 * FCKeditor - The text editor for Internet - http://www.fckeditor.net
 * Copyright (C) 2003-2009 Frederico Caldeira Knabben
 *
 * == BEGIN LICENSE ==
 *
 * Licensed under the terms of any of the following licenses at your
 * choice:
 *
 *  - GNU General Public License Version 2 or later (the "GPL")
 *    http://www.gnu.org/licenses/gpl.html
 *
 *  - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
 *    http://www.gnu.org/licenses/lgpl.html
 *
 *  - Mozilla Public License Version 1.1 or later (the "MPL")
 *    http://www.mozilla.org/MPL/MPL-1.1.html
 *
 * == END LICENSE ==
 *
 * Manages the DOM ascensors element list of a specific DOM node
 * (limited to body, inclusive).
 */

var FCKElementPath = function( lastNode )
{
    var eBlock = null ;
    var eBlockLimit = null ;

    var aElements = new Array() ;

    var e = lastNode ;
    while ( e )
    {
        if ( e.nodeType == 1 )
        {
            if ( !this.LastElement )
                this.LastElement = e ;

            var sElementName = e.nodeName.toLowerCase() ;
            if ( FCKBrowserInfo.IsIE && e.scopeName != 'HTML' )
                sElementName = e.scopeName.toLowerCase() + ':' + sElementName ;

            if ( !eBlockLimit )
            {
                if ( !eBlock && FCKListsLib.PathBlockElements[ sElementName ] != null )
                    eBlock = e ;

                if ( FCKListsLib.PathBlockLimitElements[ sElementName ] != null )
                {
                    // DIV is considered the Block, if no block is available (#525)
                    // and if it doesn't contain other blocks.
                    if ( !eBlock && sElementName == 'div' && !FCKElementPath._CheckHasBlock( e ) )
                        eBlock = e ;
                    else
                        eBlockLimit = e ;
                }
            }

            aElements.push( e ) ;

            if ( sElementName == 'body' )
                break ;
        }
        e = e.parentNode ;
    }

    this.Block = eBlock ;
    this.BlockLimit = eBlockLimit ;
    this.Elements = aElements ;
}

/**
 * Check if an element contains any block element.
 */
FCKElementPath._CheckHasBlock = function( element )
{
    var childNodes = element.childNodes ;

    for ( var i = 0, count = childNodes.length ; i < count ; i++ )
    {
        var child = childNodes[i] ;

        if ( child.nodeType == 1 && FCKListsLib.BlockElements[ child.nodeName.toLowerCase() ] )
            return true ;
    }

    return false ;
}
